AU741065B2

AU741065B2 - Repairing material for bricks of carbonizing chamber in coke oven and repairing method

Info

Publication number: AU741065B2
Application number: AU94128/98A
Authority: AU
Inventors: Takeshi Ando; Shinjiro Baba; Michio Homma; Kazuma Hori; Tadakatsu Kishi; Noboru Komatsubara; Shigeru Nakai; Teruo Onozawa
Original assignee: Taiho Kogyo Co Ltd; Kawasaki Refractories Co Ltd; Kawasaki Steel Corp
Current assignee: JFE Steel Corp; Taiho Kogyo Co Ltd; JFE Refractories Corp
Priority date: 1997-12-05
Filing date: 1998-11-25
Publication date: 2001-11-22
Anticipated expiration: 2018-11-25
Also published as: CN1223291A; BR9805653A; AU9412898A; CA2255322A1; US6156688A; EP0922684A3; DE69804577D1; ZA9811069B; TW400371B; DE69804577T2; EP0922684B1; EP0922684A2; CN1098909C; KR19990062791A

Description

P/00/011 Regulation 3.2

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

6@ TO BE COMPLETED BY APPLICANT :*.ame of Applicant: 04 Atual Inventor(s): Address for Service: n T* Invention Title: KAWASAKI STEEL CORPORATION, KAWASAKI REFRACTORIES CO., LTD and TAIHO INDUSTRIES CO., LTD Takeshi Ando; Michio Homma; Shinjiro Baba; Tadakatsu Kishi; Noboru Komatsubara; Shigeru Nakai; Teruo Onozawa; Kazuma Hori CALLINAN LAWRIE, 711 High Street, Kew, 3101, Victoria, Australia "REPAIRING MATERIAL FOR BRICKS OF CARBONIZING CHAMBER IN COKE OVEN AND REPAIRING METHOD" The following statement is a full description of this invention, including the best method of performing it known to me:- 25/11/98LP10210.CS,1 t REPAIRING MATERIAL FOR BRICKS OF CARBONIZING CHAMBER IN COKE OVEN AND REPAIRING METHOD This invention relates to a repairing material for bricks of a carbonizing chamber in a coke oven and a repairing method.

The carbonizing chamber in a coke oven is affected by various factors such as abrasion by the raw material coal, exposure to frequent repetition of cooling and heating cycles, and invasion by carbon. The surface of its bricks therefore sustain peeling and cracking, gradual excoriation of the consequently affected portions, and, eventually, heavily undulating contouring. The refractory bricks which surround S. the cast iron frame located near the mouth of the oven are particularly susceptible to peeling and cracking and experience severe surface degradation owing to such mechanical factors as OO.o.i the shocks caused by the opening and closing of the oven lid.

*000 Since this degrades the airtightness of the carbonizing 6oS.

Schamber, it forms a cause for gas leakage and poses a serious problem regarding the quality of the produced coke and the production efficiency.

One approach to this problem is to repair commercial coke ovens by blowing a powder refractory into the broken portions of joints between adjacent bricks or into the fractured portions of the bricks. For example, Japanese Patent Publication Sho 55-46998 teaches a composition using mortar as a main component and incorporating therein a bituminous substance and a liquid oil, Japanese Patent Publication Sho 56- 5713 teaches a composition using a basic refractory aggregate (such as magnesia clinker) as a main component and incorporating therein a lithium compound, clay, and sodium silicate, and Japanese Patent Publication Sho 56-15763 teaches a method for effecting repair by using a dry blowing device to II. 2 hot-blow a powder refractory containing magnesia clinker, for example, as a main component. The repairing materials of these inventions are intended to be used either dry or wet. The methods involved in these inventions invariably rely on the use of a gun or a nozzle to apply a repairing material fed from a pressure tank to the oven wall. In reality, however, inexpensive mortar or a repairing material containing mortar as a main component is used most widely in the repair of coke oven carbonizing chamber bricks.

However, such conventional repairing materials basically exhibit only poor adhesive property to cast iron and bricks (refractory). Since this makes them readily susceptible to peeling and cracking owing to the various factors mentioned above, they fall off the surface of the cast ironand the surface of bricks. The repair with these repairing materials therefore quickly loses its effect and the repair work must be frequently repeated.

The life of the repair work is especially. short when the 00@* blown repairing material happens to contain much water because the applied layer of the wet repairing material emits steam while drying and the pressure of this steam easily separates

C.

5 the applied layer of the repairing material from the oven wall S and the bubbles produced in consequence of the evaporation of the substance having a low melting points easily give rise to 0**C S cavities which cause cracks in the applied layer.

eeoC..

In the case of the mortar spray which is in popular use, for example, since the mortar has a proper particle size distribution in the approximate range of 0.05 mm several mm and uses SiO 2 and A1 2 0 3 as main components, the applied layer of this repairing material does not conspicuously give rise to cavities in consequence of the formation of bubbles. The life of the repair work by the mortar spray, however, is only about one week because the mortar exhibits an extremely weak adhesive -3power to cast iron and bricks.

When the repairing material which contains mortar as a main component as described above is used for repair, the adhesive property is somewhat better than that of the repairing material which is formed solely of mortar. When the solidified applied layer of this repairing material is exposed to repeated cooling and heating cycles, however, it ultimately sustains cracks owing to the repeated cycles of contraction and expansion.

When this happens, the tarry matter in the oven enters the cracks and coagulates in the cracks when the applied layer cools. Repetition of this lo process gradually enlarges the cracks and promotes separation of the applied layer of repairing material from the oven wall.

None of the existing repairing materials using mortar as a main component is found to be capable of providing a lasting repair effect.

The repairing material of this invention consists in a composition S 15 obtained by combining mortar with relatively small amounts of other components. The repairing material of this invention possesses outstanding lille properties such as high adhesive strength to not only the refractory bricks forming the carbonizing chamber in the coke oven but also the portions near the mouth of the oven where cast iron and refractory bricks make contact, 20 resistance to bubbling and cracking, and long-lived repair effect that is Oi: several to some tens of times that obtained with a repairing material formed solely of mortar. This invention further embraces a method for effecting repair by the use of this repairing material.

Specifically, this invention is directed to a repairing material for bricks of the carbonizing chamber in a coke oven, obtained by compounding 100 parts by weight of mortar comprising Si02 and A1 2 0 3 as main components, 0.1 10 parts by weight of a powder comprising 70 07/0901,gc10210.spe,3 100 wt. of at least one member selected from the group consisting of Co compound, Ni compound, and Al compound and 0 30 wt. of at least one member selected from the group consisting of Ca compound, Mg compound, Zn compound, Sr compound, Ba compound, Fe compound, V compound, Pb compound, Cu compound, and Ti compound, and 2 50 parts by weight of a liquid containing Si, at least one member selected from the group consisting of Na and K, B, and P at respective contents in the range of 1 30 wt.

as Si0 2 3 34 wt. as Na 2 O and/or K20, 1.5 12 wt. as

B

2 0 3 and 0.3 -4 wt. as P 2 0s and the balance of water.

The invention is also directed to a method for repairing the carbonizing chamber in a coke oven by the use of the repairing material.

Figure 1 is a diagram illustrating one example of the a 00 apparatus for spraying the repairing material of this invention.

B

The repairing material of this invention is obtained by compounding 100 parts by weight of the mortar component (a) with 0.1 10 parts by weight of the powder component and 2 50 parts by weight of the liquid component The components of the composition will be described in detail below.

The reasons for maintaining the compositions and contents of the powder component and the liquid component (c) within the aforesaid ranges is as follows.

3 When the composition or content of either of components falls outside the specified range, the repaired portion does not satisfy the requirements with regard to such properties as adhesive strength, porosity, compressive strength, elasticity and bulk specific gravity.

One effect of the liquid component is, for example, formation of borosilicate glass that modifies the mortar into a strongly bonded texture.

Although the compressive strength and bending strength of the repaired portion increase with increasing Si02 content of the liquid component an excessive Si02 content lowers the adhesive strength thereof.

Conversely, when the Si02 content is deficient, high adhesive strength is obtained at the sacrifice of compressive strength and bending strength.

Although the B 2 0 3 and P 2 0 5 in the liquid component (c) work to lower the glass melting point, excessive amounts of these constituents degrades solubility and causes crystal precipitation and other undesirable effects.

The specified content of Na20 and/or K 2 0 is that requiired for total dissolution of the Si, P and B compounds.

The specified content of the powder component is that necessary for improving the adherence, compressive strength and bending strength of the repaired portion and for obtaining 0 an appropriate coefficient of thermal expansion and an appropriate melting temperature range.

The mortar used as the component in this invention is not particularly limited as to composition. Generally, the mortar is only required to use Si02 and A1 2 0 3 as main components and further incorporate therein other components such as Fe20 3 CaO, MgO, Na20, and K 2 0 in suitable contents.

The relation between the composition of the mortar S• component and the liquid component in the repairing material of this invention is as follows.

•When the Si0 2 as one of the main components of the mortar accounts for not less than 60 wt. of the total amount of Si0 2 and A1 2 0 3 namely when the mortar has a Si02 rich composition, the adhesive property exhibited by the repairing material increases with decreasing SiO02 content of the liquid component Specifically, the Si0 2 content of the liquid component is preferred to be not more than 10 wt. When the A1 2 0 3 accounts for not less than 60 wt. of the total amount of the main components of the mortar, namely when the mortar has an A1 2 0 3 rich composition, the adhesive property of the repairing material increases with increasing SiO 2 content of the liquid component Specifically, the SiO 2 content of the liquid component is preferred to be not less than wt. The powder used as the component in this invention comprises 70 100 wt. of at least one member selected from the group consisting of Co compound, Ni compound, and Al compound and 0 30 wt. of at least one member selected from the group consisting of Ca compound, Mg compound, Zn compound, Sr compound, Ba compound, Fe compound, V compound, Pb compound, Cu compound, and Ti compound. Typically, Co(OH) 2 CoO, Co 2 0 4 and Co 2 0 3 may be cited as concrete examples of the S. Co compound, Ni(OH) 2 NiO, Ni 2 03, and NiCO 3 as concrete examples of the Ni compound, AlPO 4 Al(P0 3 3 Al(OH) 3 and A1 2 (SI0 3 3 as a concrete example of the Al compound, Ca(OH) 2 CaCO 3 CaO, Ca 3 (P0 4 2 CaCO4-1/2H 2 0 as concrete examples of the Ca compound, Mg(OH) 2 MgCO 3 MgO, and MgSO 4 as concrete examples of the Mg compound, ZnO and ZnCO 3 as concrete examples of the Zn compound, Sr(OH) 2 SrCO 3 SrO and SrS0 4 as concrete examples of the Sr compound, BaSO 4 BaO, BaC03, and Ba(OH) 2 as concrete examples of the Ba compound, Fe20 3 Fe 3 0 4 and FeOOH as concrete examples of the Fe compound, V 2 0s, NH 4

VO

3 S and V 2 0 4 as concrete examples of the V compound, Pb 3 0 4 PbCO 3 and PbO as concrete examples of the Pb compound, CuS04, CuO, CuCO 3 and Cu(OH)2 as concrete examples of the Cu compound, and TiO 2 and Ti(SO 4 2 as concrete examples of the Ti compound.

Among the constituents of the powder component Co compound, Ni compound, and/or Al compound improves the adhesiveness of the repairing material to cast iron, and bonding strength and bending strength of the repairing material after the applied layer of the repairing material solidifies. The addition to one or more of these compounds of one or more of powders of Ca, Mg, Zn, Sr, Ba, Fe, V, Pb, Cu, and Ti compounds decreases the thermal expansion coefficient of the solidified applied layer of the repairing material, expands the range of melting temperature, and enhances the surface hardness of the applied layer of the repairing material.

Since the content of the powder component (b) incorporated is in the range of 0.1 10 parts by weight, based on 100 parts by weight of mortar, the content of the Co compound, Ni compound, and/or Al compound is in the range of 0.07 10 parts by weight and that of the one or more Ca, Mg, Zn, Sr, Ba, Fe, V, Pb, Cu, and Ti compounds is in the range of S. 0 3 parts by weight.

The composition of the liquid component in this invention may be expressed in terms of oxides as follows.

SiO 2 1 30 wt. Na20 and/or K20 3 34 wt.

B

2 0 3 1.5 12 wt.

P

2 0 5 0.3 4 wt. and Water Balance This liquid component is an aqueous solution having an alkali salt of silicic acid as a main component, additionally containing an alkali salt of phosphoric acid and an alkali salt of boric acid, and having a melting point of the oxide composition of not higher than 800 0

C.

SExamples of the alkali salt of silicic acid include sodium metasilicate, potassium metasilicate, sodium orthosilicate, potassium orthosilicate and hydrates thereof, water glass No. 1, water glass No. 2, and water glass No. 3, for example. Examples of the alkali salt of phosphoric acid include sodium and potassium salts of tertiary phosphoric acid, secondary phosphoric acid, metaphosphoric acid, pyrophosphoric acid, and polyphosphoric acids (tripolyphosphoric acid and hexametaphosphoric acid), for example. Examples of the alkali salts of boric acid include sodium and potassium salts of metaboric acid, orthoboric acid, and tetraboric acid, the reaction product of boric acid with sodium hydroxide, the reaction product of boric acid with potassium hydroxide, borax and its hydrate.

The liquid component expels the water content thereof by evaporation at elevated temperatures, melts at a temperature not higher than 800 0 C, enhances the adhesiveness of the repairing material to the refractory bricks and the cast iron, partially fills the cavities occurring in the sprayed layer of the repairing material, improves the airo tight property of the sprayed layer of the repairing material *0 Sand improves the smoothness of the repaired surface. The 5 0 oxides which originate in the solution of the liquid component comprise 2 86% of SiO 2 6 92% of Na20 and/or K 2 0, 2 74% of B 2 0 3 and 0.4 42% of P 2 0 5 The proportions of these oxides to 100 parts of mortar are 0.05 15 parts of SiO 2 0.15 17 parts of Na20 and/or K20, 0.075 6 parts of B 2 0 3 and 0.015 2 parts of P 2 0s.

00 The repairing material of this invention for the bricks *0 of the carbonizing chamber in the coke oven is hot sprayed onto the parts requiring repair under high pressure by the use of a gun or nozzle when the mouth of the oven is open after the expulsion of the produced coke.

"e As shown in the schematic view of Figure 1, inlets communicating with a powder container 2 and a liquid container 3 are provided at points along the length of a discharge conduit connected to a compressor 1, and the mortar, the powder component the liquid component and optionally water are discharged in their required amounts into the discharge conduit to form the repairing material of this invention. To effect the required repair, this repairing material has only to be sprayed onto the portions requiring the repair by the use of a spray device provided at the leading end thereof with a nozzle 4. The discharge pressure is in the range of 5 8 kg/cm 2 and the amount of the material to be sprayed onto the oven wall is in the range of 4 kg/m 2 The repairing material is sprayed onto the bricks to be repaired in an amount to produce an applied layer having a thickness in the range of 10 60 mm, depending on the degree of undulation of the brick surface.

The compositions placed in the powder container 2 and the liquid container 3 will be explained. The following four cases are conceivable: Powder container 2 mortar Liquid container 3 powder component liquid 0 component (c) .oooo) S" Powder container 2 mortar 6ooo Liquid container 3 powder component liquid o component water Powder container 2 mortar powder component (b) Liquid container 3 liquid component (c) Powder container 2 mortar powder component (b) Liquid container 3 liquid component water.

In the cases of and the liquid container 3 requires means for preventing the powder component from separating by sedimentation. In the cases of and care must be taken to ensure uniform mixture of the mortar and 0 the powder component in the powder container 2.

The choice regarding whether and how much water should be added is made based on the concentration of the composition of the liquid component and the contents of the three components, i.e. the mortar, powder component and liquid component Example 1 The test pieces were obtained by inserting 40 x 40 x mm refractory bricks, in 40 x 40 x 160 mm test frames, casting into the remaining 1/2 space of each test frames one of the repairing materials of Formulations 1 16 and Comparative Formulations 1 and 2 indicated in Table 1 and Table 2, thermally drying the repairing material in an electric oven at 110°C for 10 hours, and firing the dried repairing material at 900°C for three hours. The solidified repairing material was tested for adhesive strength and bending strength and rated for quality based on the results of the tests. The mortar used in this Example was composed of 55 wt. of SiO 2 40 wt.

of A1 2 0 3 and 5 wt. of the other components (FeO2 3 CaO, SMgO, Na20, and The adhesive strength is indicated as the magnitude of Sbending strength measured at the interface between the repairing material and the refractory brick in the test piece.

The test piece was tested for porosity by measuring its gas permeability.

*e

S

Table I Invention Formulation 12 3 4 5 6 7 8 9 Weight ofmortar component 6) 100 100 100 100 100 100 100 t00 100 Weight of powder component 1 0.1 3 5 10 5 2 7 4 Weight of liquid component 30 1050 30 20 4.0 20 35 Co(OH)2 100 4j 0,coo 100 70 90 0 4,Ni(OH)2 100 1: 'Ni0 100 'AlP0, 80 oICa0 20 41 Zno 0 'Fe,04 'a NH4VO, 1! Pb304 -Potassium metasilicate Sodium orthosilicate Water glass No. 1 70 a Water glasNo. 2 30 30 .0 Water gasNo. 3 030 4 Sodium secondary phosphate 3 M Potassium metaphosphate, 4 0 Sodium pyrophosphate 5 3 3 OR Sodium tripolyphosphate 2 U Potassium tripolyphosphate 0 Potassium hexametaphosphate 3 2 0 Sodium metaborate 20 S. Sodium orthoborate** 20 8O. '4 Potassium tetraborate 10 15 10 Borax 5 is -H LWater 50 48 52 22 57 53 47 60 56 S Amount of liquid component 15.03 2.75 16.45 13.14 6.82 12.76 6.92 11.52 2.89 as m n 109 QLQdu-L_ Ash 19.5siio 423 3.0 5. 2. 30 521473.

rio 1954.S2.i832.4 3. 52 473.

JNaO and/or IKiO 64.3 31.6 50.1 33.8 43.3 35.1 39.6 61.4 34.6 hP 2 05 5.3 4.2 5.5 3.7 4.4 3.8 4.6 7.2 8.4 1 B203 .10.9 21.8 12.4 4.2 31.0 28.1 30.6 16.6 20.7 *Prepared by the reaction of boric acid with NaOH; 72.7 wt. of Na2O mnd 27.3 wt. of 13203.

0@S *ee 0 00 S 0 0 9 0 S 0 S 900 00 9 0 6OI* 0 0 9 06 9 9 9 0~ 0 0 9 *6 090 0 5 0 C 0* 0 6 0 9 S SO 0 405 0 9 0S 0 0 Se 50. Table 2 Invention Formulation Comparative Formulation If 12 13 14 15 16 1 2 Weight of mortar component 100 100 100 100 100 100 100 100 Weight of powder component 1 5 5 2 3 2 2.5 Wight of liquid component 30 25 50 30 25 30 40 .;s0H o a 1NiO s0 0 *AIP04 80 70 go 0 w Mg0 15 As inCO, 0 :Fe0OH5 U 'NH4VO3 w iSrCO; 0 &BaSO4 0 1tCu(OH)i 20 3 0TiO2 13 -otassium metasilicate 20 20 Water glass No. 1 20 0 Water glass No. 2 44Water glass No. 3 10 j Sodium secondary phosphate 2 o, Sodium tertiary phosphate SPotassium metaphosphate, 3 o Potassium hexametaphosphate 2 Sodium pyrophosphate 1 2 a -A Sodium tripolyphosphate 2 C03 Sodium metaborate 5 1 20 0 Potassium tetraborate 2 0 Borax 25 24 Q WNater 50 74 63 60 5e 53 48 Amount of liquid component 11.46 4.23 9.76 11.96 7.98 11.27 13.42 -i ash based on 100 of Ash composition s io' 25.8 43.2 14.9 19.6 21.9 32.8 .25.9 INa2O and/or K20 44.7 .38.0 30.9 54.1 36.9 45.0 39.7 P205 5.7 3.1 9.3 2.5 3.8 2.8 2.8

S..

S S 0 4 0 5 S 9 a 005 S SO 0 5 SOS *O 0@5 OS 6 0 5 S *5 0 6 0 05 S S S S S 9 505 500 0 0 5 0B SO 0 ie* S S 55 0

SOS

56. ~S 13 The results are shown in Table 3.

Table 3 Adhesive Strength Bending Strength Porosity (MN/m 2 (MN/m 2 Invention Formulation 1 2.88 9.08 28.4 Invention Formulation 2 2.52 8.24 26.8 Invention Formulation 3 3.09 7.3 26.0 Invention Formulation 4 4.72 8.5 27.6 Invention Formulation 5 5.09 8.64 28.6 Invention Formulation 6 8.1 9.25 27.8 Invention Formulation 7 4.14 7.38 28.0 Invention Formulation 8 3.21 9.75 26.0 Invention Formulation 9 2.58 6.13 25.5 Invention Formulation 10 6.17 9.55 26.7 Invention Formulation 11 2.15 9.08 28.5 Invention Formulation 12 7.98 9.17 26.9 Invention Formulation 13 7.62 9.43 27.3 Invention Formulation 14 5.07 8.55 26.4 Invention Formulation 15 6.33 9.19 26.0 Invention Formulation 16 7.21 8.87 27.0 Comparative Formulation 1 0.3 4.35 27.5 C Comparative Formulation 2 0.4 5.01 27.9

S

005 '05

OS

S

Example 2 The repairing materials of Invention Formulations 1 16 and those of Comparative Formulations 1 and 2 indicated in Table 1 and Table 2 above were prepared by kneading the relevant components and were used to repair the carbonizing chamber of an operating coke oven by way of a field test.

The main specifications of the coke oven used in the field test were as shown below.

1. Number of kilns: 86 2. Size of carbonizing chamber: 6.5 m in height, 420 mm in width, and 15.9 m in length, 3. Time required for one cycle: 23 hours 4. Time for expulsion of produced coke: 5 minutes Temperature of oven wall in carbonizing chamber: 1100 1200 0 C in the central part and 900 1100 0

C

at the kiln mouth.

The repairing material was sprayed by the use of the spray device illustrated in Figure 1 after the coke produced S" in the preceding cycle was discharged. The temperature of the 0SSO 000 oven wall near the kiln mouth while hot was in the approximate e~e: 0 range of 500 800°C and the area of repair was about 100 150 cm from the kiln mouth. Though the thickness of the applied layer of the repairing material was not constant S" because the repairing material was sprayed to a greater S0 S thickness in the valleys remaining after exfoliation, it was generally in the approximate range of 10 60 mm. The amount S of the repairing material was in the approximate range of 2 kg/m 2 The smoothness of the repaired surface formed was high.

The items inspected were adhesiveness (resistance to separation) of the repairing material to cast iron and bricks and the leakage of gas. Adhesiveness was measured as the number of days between application of the repairing material by spraying and separation of the applied layer and gas leakage as the number of days before the applied layer showed before first sign of gas leakage.

The results are shown in Table 4.

[Table 4] Number of days before Number of days separation of applied before first sign layer of repairing material of gas leakage Invention Formulation 1 64 68 Invention Formulation 2 56 59 Invention Formulation 3 69 75 Invention Formulation 4 105 110 Invention Formulation 5 113 120 Invention Formulation 6 not less than 180 not less than 180 Invention Formulation 7 92 101 Invention Formulation 8 71 78 Invention Formulation 9 57 62 Invention Formulation 10 137 145 Invention Formulation 11 48 51 Invention Formulation 12 not less than 180 not less than 180 Invention Formulation 13 175 180 Invention Formulation 14 120 125 Invention Formulation 15 148 150 Invention Formulation 16 163 168 Comparative Formulation 1 6 7 Comparative Formulation 2 10 11 0e *0 0O

S

0* 0 0000 0

S

0*.5 16 As can be seen from the foregoing, the invention repairing material for the bricks of the carbonizing chamber in coke ovens exhibited higher adhesive strength to the refractory bricks and to the cast iron frame near the kiln mouth, abounded in resistance to shock, excelled in smoothness of repaired surface, and offered satisfactory resistance to gas leakage as compared with the conventional repairing material.

The repair of the bricks of a carbonizing chamber in a coke oven done by use of the repairing material of this invention, particularly that at the kiln mouth, is thus highly durable.

Where the terms "comprise", "comprises", "comprised" or "comprising" are used in this specification, they are to be interpreted S~ as specifying the presence of the stated features, integers, steps or components referred to, but not to preclude the presence or addition of one or more other feature, integer, step, component or group Sthereof.

r oo ir

Claims

1. A repairing material for bricks of a carbonizing chamber in a coke oven, obtained by compounding 100 parts by weight of mortar comprising SiO 2 and A1 2 0 3 as main components, 0.1 10 parts by weight of a powder comprising 70-100 wt. of at least one member selected from the group consisting of Co compound, Ni compound, and Al compound and 0-30 wt. of at least one member selected from the group consisting of Ca compound, Mg compound, Zn compound, Sr compound, Ba compound, Fe compound, V compound, Pb compound, Cu compound, and Ti compound, and

2-50 parts by weight of a liquid containing Si, at least one member selected from the group consisting of Na and K, B, and P at respective contents in the range of 1 30 wt. as Si0 2 3 34 wt. as Na20 and/or 15 K20, 1.5 12 wt. as B203, and 0.3 -4 wt. as P 2 0 5 and the balance of water. 2. A repairing material according to claim 1 wherein said Co compound is at least one member selected from the group consisting of Co(OH) 2 CoO, Co 2 0 4 and C0 2 0 3 20 3. A repairing material according to claim 1, wherein said Ni compound is at least one member selected from the group consisting of Ni(OH) 2 NiO, Ni 2 0 3 and NiCO 3

4. A repairing material according to claim 1, wherein said Al compound is at least one member selected from the group consisting of AIPO 4 AI(P0 3 3 AI(OH) 3 and A1 2 (SiO 3 3 A repairing material according to claim 1, wherein said Ca compound is at least one member selected from the group consisting of Ca(OH) 2 CaCO 3 CaO, Ca 3 (P04)2, and CaSO 4 .1/2H 2 0.

6. A repairing material according to claim 1, wherein said Mg compound is at least one member selected from the group consisting of Mg(O H) 2 MgCO 3 MgO, and MgSO 4 07/09/01 ,gc10210.spe,17 18

7. A repairing material according to claim 1, wherein said Zn compound is at least one member selected from the group consisting of ZnO and ZnCO 3

8. A repairing material according to claim 1, wherein said Sr compound is at least one member selected from the group consisting of Sr(OH) 2 SrCO 3 SrO and SrSO 4

9. A repairing material according to claim 1, wherein said Ba compound is at least one member selected from the group consisting of BaSO 4 BaO, BaCO 3 and Ba(OH) 2 A repairing material according to claim 1, wherein said Fe compound is at least one member selected from the group consisting of Fe 2 03, Fe 3 0 4 and FeOOH.

11. A repairing material according to claim 1, wherein said V compound is at least one member selected from the group consisting of V 2 Os, NH 4 VO 3 and V 2 0 4

12. A repairing material according to claim 1, wherein said Pb compound is at least one member selected from the group consisting of Pb30 4 PbCO 3 and PbO.

13. A repairing material according to claim 1, wherein said Cu compound is at least one member selected from the group consisting of CuSO 4 CuO, CuCO 3 and Cu(OH) 2

14. A repairing material according to claim 1, wherein S. said Ti compound is at least one member selected from the group consisting of Ti0 2 and Ti(SO 4 2 A repairing material according to claim 1, wherein said liquid consists essentially of at least one member Oo* selected from the group consisting of alkali salt of silicic acid, alkali salt of phosphoric acid, and alkali salt of boric acid and having an oxide melting point of not higher than 800 0 C.

16. A repairing material according to claim 15, wherein said alkali salt of silicic acid is at least one member selected from the group consisting of sodium metasilicate, 4 19 potassium metasilicate, sodium orthosilicate, potassium orthosilicate, and hydrides thereof, water glass No. 1, water glass No. 2, and water glass No. 3.

17. A repairing material according to claim 15, wherein said alkali salt of phosphoric acid is at least one member selected from the group consisting of sodium and potassium salts of tertiary phosphoric acid, secondary phosphoric acid, metaphosphoric acid, pyrophosphoric acid, and polyphosphoric acid (tripolyphosphoric acid and metaphosphoric acid).

18. A repairing material according to claim 15, wherein said alkali salt of boric acid is at least one member selected from the group consisting of sodium salts and potassium salts of metaboric acid, orthoboric acid, and tetraboric acid, the reaction product of boric acid with sodium hydroxide, and the reaction product of boric acid with potassium hydroxide.

19. A method for repairing bricks of a carbonizing chamber in a coke oven, which comprises hot applying the repairing material set forth in claim 1 to the portions of the S bricks of the carbonizing chamber in the coke oven which are in need of repair. A repairing material substantially as herein described.

21. A method for repairing bricks substantially as herein described.

22. Bricks whenever prepared according to the method of claim 19 or 21. DATED this 25th day of November, 1998. KAWASAKI STEEL CORPORATION, oKAWASAKI REFRACTORIES CO., LTD and TAIHO INDUSTRIES CO., LTD By their Patent Attorneys: CALLINAN LAWRIE